Complex Arithmetic is a simple app for performing the five operations of addition, subtraction, multiplication, division and conversion of complex numbers. It is useful for the student and practitioner in the many technical disciplines which use complex numbers. These numeric operations which require a number of steps and trig functions are instead done with the touch of a button. Direct button operations are provided for the operations with the exception of subtraction.

Two complex numbers in rectangular form are entered into the number 1 and number 2 fields labeled real and imag. Pressing one of the four function buttons then gives the input numbers in polar form. Concurrently the corresponding answer is displayed in both rectangular and polar form.
The subtraction operation is done by entering the negative of the number which is the subtrahend.
The square root operation is the square root of the product of the two numbers entered.

The conversion button accesses a screen which provides for the conversion of a complex number between the rectangular and polar forms.